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Warning:
Liquid nitrogen is extremely cold and can be hazardous. When you use liquid
nitrogen, always follow standard laboratory safety practices, and make sure your dewar is
made to use with liquid nitrogen. Wear protective clothing and eyewear, and avoid letting
liquid nitrogen come into contact with your skin.
1.—Open the detector dewar cover and remove the plastic stopper from the dewar.
Warning:
Make sure you pour the liquid nitrogen slowly when you fill the vacuum bottle or
the detector dewar. Pouring too quickly can cause liquid nitrogen spray out. Wear protective
clothing and eyewear, and follow standard laboratory safety practices to prevent injury.
2.—Fill the metal vacuum bottle with liquid nitrogen.
Notice: Do not spill liquid nitrogen on or near the detector window. If the window's O-ring
seal is cooled very rapidly, the dewar may lose its vacuum and expose the detector element to
damaging atmospheric pressure.
3.—Insert the funnel into the detector dewar, and pour the liquid nitrogen slowly into the
funnel. (A small amount of liquid nitrogen typically spills out of the funnel. This will not
harm your instrument.)
Fill the funnel and then let it drain completely two or three times. Wait until the vapor
plume disappears and then repeat until the dewar is filled.
12
Using Your Nicolet iS10 Spectrometer
Thermo Fisher Scientific
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